人民法院在专利侵权诉讼中不得行使应由专利复审委员会行使的宣告专利权无效的职权,即被告不得以专利权无效为抗辩事由。文章探讨了专利无效作为抗辩事由的正反两方面的观点,借鉴他国的司法实践,虑及中国知识产权法官专业水平的提高,为降低社会成本,提高诉讼效率,笔者认为应引入专利权无效抗辩。 In a patent infringement lawsuit, the people’s court shall not exercise its authority to declare the patent right invalid by the Patent Reexamination Board, that is, the defendant may not plead the patent invalid. This article discusses the pros and cons of patent invalidation as defensive reasons, draws lessons from the judicial practice of other countries, considers the improvement of professional standards of Chinese intellectual property judges, in order to reduce social costs and improve the efficiency of litigation, the author thinks that patent infringement defense should be introduced .